Becomes unresponsive, curser moves but no input possible.
This is the second logic board which does this. No key board input either. Is this a common fault in these models? Dan had told me that the PHC is the likely culprit , so I justput in another board….only to get still the same issue, after about 15min. . The SSD is a new Kingston 1TB, the content is OS10.6.8 , because my friend (who owns it) wants to keep using his old Final Cut Pro and other film editing programs. I will try the SSD in yet another Mac to msee if the SSD or theb OS on it causes the seizure…
Thank you Dan, it is a Kingston SATA III backwards compatible to II according to the blurb:
I have been using these extensively with iMac upgrades in the past, with good results. Also, I think by now I can rule out this specific SSD, because I installed it in a 2009 MBP and it runs just fine in that laptop. ( I have been making a backup of the content without failure so far) Meanwhile, the iMac is now being tested with another SSD running 10.11 , and it runs better, longer…..until it seizes up again, ie: curser moves, but unresponsive to click or key input. You tube also becomes erratic after a while…So it does seem to be either the logic board again, or the CPU on it (which came off the previous logic board which was suspected to have PHC issues) or the GPU, I would deduct….unless you have a better idea?